Detachable coupling for high pressure hose



Aug. 31, 1943. w. F. sAN'rHoFF l 2,328,298

DETACHABLE COUPLING FOR HIGH PRESSURE HOSE Filed Sept. 10, 1941 @WWW/MMM j@ Mmmm :inventor:

WAL TER /r SAW/fom M I (Ittorneg This sleeve, as shown inl Fig. 3,l has a central cylindrical portion 30 and opposite tapered endA faces 3I and 32. A cylindrical extension 33 may be formed as a continuation of the end face 32 and is of'an'outside diameter to fit within the boreV 2I. 'Ihe inside diameter of thesleeve and theextension 33Aagree Awith the outside diameter of the length I5of the hose II). The length of the central cylindrical portion 3of'the sleeve 29 is such 'as to dispose the tapered face 3| beyond the.

Vend of the tubular extension I9 when the tapered face 32 of the' sleeve 29 is seated against the face 23. Positioned over L,the threaded end I9 of the coupling is a sleeve 34, particularly shown in Fig. I 2V. The sleeve has a threaded Atubular extension 35i into which the' member I 9 is screwed. A reduced out any action yto abrade thewall of the hose. Various devices have been heretofore provided for gripping a hose of the character here described but these have involved the use of a threaded member or a serrated member which would be imbedded into the inner surface of the A. wall of the'hose'or into the outer surface'rof the n the hose tended torupture and would then cause ,105

central -portion 36 of thef'sleeve 34 provides tapered faces 31 and-38 within the sleeve.

The

tapered face 38engages the tapered' end 3I of the 1 sleeve 29 ;'thus,1 when `the sleevev 34 isscrewed,

sleeve 29into `the counterbore 22',and'due to the taper at 'thev opposite end of the nsl'eeve'ZiJJwill tend to force the sleeve inwardly and around the portion I5 oflthe hose*- I0 to tightly embrace the hose and form 'a seal-tight"joint between it and thewau cf the counterbore 22. nis preferable that the Vsleeve 29 shall b'e-made of ductile metal,"

Vsuch for example aslbronze, since thiswould tendr todaeA deformed under pressure fandvto form ia tight seal.' The reduced portion 3% of the threaded sleeve 34'has a cylindricalv center length claim and desire to" secure by Letters Patent ist 30l 'A' detachable coupling for highpiessure hose,r

between the inclinedvfaces 31 and 38 which agrees'A substantially with: the outside diameter of the length ,I5 .ofrthehosa and thusimakes artight fit f therewitnr. `Extending beyond' the inclined face, 3`Ifof thethreaded sleeve is a cylindrical skirtgl which isrof substantially the diameter ofthe outside of tl'ienlain-booly of the hose I 0 and fits there'- around.

ywan of the hose-witharesun that-fthe wan` of the hose to materially weaken.v With the type of hose as here Vshown couplings have been tested `under:pressuresup to 24,500 pounds per square finch.' f Y It will thus be seen thatthe coupling structure :here `disclosed provides simple and eifective means whereby a iitting' may be attached to the end l of a hose or removed therefrom, and which fitting einbodiesrneansV for positively embracing and f gripping the wall'of a hose 'and reinforcing the same without marring or weakening the struc- Yturely N While I have shownthe'fpreferred termici invention as now known to ine, itwill berunder- 4'stood thatvarious changes may be ymade in combination, construction andgarrangeinent of parts bythse .skilled in the arg1-without" departing from'the spirit ofrny invention as claimed, Having thus described my `invention, what I saidlho'se having a plurality of laminae in itswall, at least the outer one of which-is removed for al distance at theend thereof, a coupling body` termed at one endwith a threaded portion VVto make arpipe connection and at its-opposite end with an eXteri/orly threaded-tubular portion hav;-V

irgan' inner central Yborerai'idr'an outer counter- In the for'm of the invenncnsnewn 'iii ing. 4,Y

v'of the drawing thecouplingv body I1 is made with'n duplicate ends, and altubular member 26@ is'pro videdY whichgextends entirely through' thefcoue pling body so Vthat lengths of hose may be connected on oppositesides of the coupling and the `devicewill provide arnnon for two pieces oihosue.: `AIn operation of thepre'sent invention the structurels assembled with the tubel or 426pressed into position and-soldered. The endof'tlie hoseV le is prepared as shown in l ofthe drawing so that a reducedportion I5-is forced vinto the cylindricalrbore ZI' of thecoupling and with the YsleeveZil in position to fltinto the bore 22 and abut` against the tapered shoulder 23. vIt. is also tofbe understood that at this time therthreaded l sleevej'il has been positionednupon thejend of the hose, so thatwwhen itis screwed ontothe kmember Ifoi 4the coupling the facetitewillbe forcedY againstrvtheitap'eredend face Vil of the:

sleeve '29 and the sleeve, 2,9 vwill-be forced inwardly n Vso that 'the protruding cylindrical part' 33 will enterthe bore 22 andaround the extension I5 of the.y hose IQ,

Y' has vbeen tightened ftolits vextreme position it p `will beseen that the length vof yhose l5 will'fbe pressed betweenthe rigid wailof thetube i'and4 the'sleeve 29. Attention isdirected tothe factthat under these conditions the walletthe hose will be gripped between two metal members `with- When the Ythreaded sleeve 3ft tion of larger'diameter'adapted to lit within the outer b orejolv the coupling body and 'to extend therebeyond, said sleever having an intern'uediate borewith an intermediate annular tapered faceand'int'o" which vtubular portion theend Yof( the; hose of reduceddiarneter extends, a central tribu-: lar mandrel ix'ed within the coupling bodyl and extending longitudinally of Ythe tubular extension thereof and rtherebey'ond, said mandrel; tting f' tightly vvritlfiin'V the hose,V aly deformable packing ysleeve ttedV upon they reduced' endpo'rtion ofthe hose, said sleeve having a cylindrical extensionVv adapted to t between the hose .and the inner bore of the coupling bodyy and a cylindrical por-`V tapered face abutting f against the vtapered face within theV threaded tubular extension,Y .anda threaded sleeve, one. endi'o'f which 4engages the' threads of the'tubular :extension and the otherf l end rofA which is 'formedfwith' lal counterbore to embrace the outside diameter ofthe hose,A said sleeve havingk anintermediate n portion f fitting around thepfreduced diameter,oflthe'hose and-a taperedffa'ce `.abutting against the outer 'tapered face of the packing sleeve, whereby theV hose will be connecl-within the threaded sleeve and. will -force the packing sleeveV into'atigl'itened position around the portion of the/hose withinthe tubular mandrel, the inner bore 'of' the coupling body terminating inA a ,tapered end vface"around' the tubular Inandrel',`.and a tapered packing washerA Vfitting against said face and' against whichthe endoi the hose rests, Y

f *Y ,WALTER rneANrnoFFf 

